Translation of Schraubendreher

The mothers of my girlfriends were so insulted when I never wanted to eat their food. I mean, in the beginning they liked me, but once the saw my eating habits everything changed. I guess I blew it.
Hemingway is trying to tell us a story about two people cannot fulfill their desires and needs, such as having free sex, drinking alcohol, spending the nights in bars and clubs and generally having fun.
We went back and took our bags from the travel agent, where we left them earlier. We wanted to catch the bus back to the station before darkness, as we knew that people drove crazy over there.